I personally would rather just buy an axel back. It's already assembled with stainless tips welded on, brackets in place, etc. It's a savings yes, but not necessarily huge. Then I can install it myself in my spare time since exhaust shops are never open when I'm off work
I just sent a message to get a quote about a CAI/Scoop/Bottle Relocation and MRT V2.0 axel back.